Windmill



(NQ Model.)

D. D. WALKER.

WINDMILL.

Patented Ju1y5, 1887.

n NRYS IM Lw w L@ Unirse STATES PATENT Finca.

DUDLEY D. VALKER, OF OGDEN, 'NEW YORK.

WINDMILL.

SPECIFICATION forming part of Letters Patent No. 365,955, dated J'uly 5, 1887.

Application filed April 23, 1887.

To @ZZ when?, it may concern:

Be it known that l, DUDLEY D. WALKER, of Ogden, in the county of Monroe and State of New York, have invented a new and useful Improvement in NVindmills, which improvement is fully set forth in the following speer tcati'on, and shown in the accompanying drawings.

The object of my invention is to produce an improved windmill, the improvement relating mainly to the wheel, and consisting in the manner of bracing and supporting the blades and arms carrying them, to the end t-hat the wheel shall `be light and sensitive to the aetion of the winds.

Referring to the drawings, Figure lis a front elevation of the improved wheel, a part of one ofthe blades being broken away; Fig. 2, a side elevation of the same with connected parts, seen as indicated by arrow m iu Fig. l, parts being broken away and omitted, one of the blades and parts attached being shown in dotted lines; Fig. 3, a View of the parts, seen as indicated by arrowsg/ in Fig. 2, the arms being broken away at their outer ends and the blades and other parts omitted; Fig. 4, drawn to a larger scale, shows the manner'of attaching the bracesfor the arms, the latter,with the tlange, being in part broken away and sectioned, the figure being seen in the direction in which Fig. 2 is seen; and Fig. 5, seen in the direct-ion in which Fig. 2 is seen, better shows the manner in which the secondary ties connect the band with the main braces of the blades, the band and contiguous blade being sectioned through the openings through which the tie passes.

Referring to the parts', A is the wheel, B the frame or support therefor, and C the vane, which frame and vane are of common kind.

a is the shaft of the wheel, resting in a bearing, b, of the frame and provided with a crank, c, at its inner end.

d is a hub secured to the shaft, from whichV arms e extend outward to hold blades f, which blades are secured rigidly to thearms by bolts at g.

To the crank c is attached a pitman, h,which connects with a vertically-moving pump rod,

z', having bearings in the frame at c' and d. Said crank, pitman, and pump-rod being of common kind, are notherein further described. A rod, 7c, is passed around the outer ends of the blades and secured rigidly to the latter, forming a peripheral ring for the purpose of strengthening said blades.

Z is a series of main tierods for the blades, there being one for each blade, each tie-rod having one end made 'fast to the forward edge of a blade and extending in front thereof to the inner bolt g of the nearest adjacent or succeeding arm e and in rear thereof.

n is a series of secondary short ties for the blades, each being joined at 0 to a main brace l at one end and to the overhanging cornerp of the nearest blade at the other end.

r is another series of secondary ties joining the braces Zwith the respective rear edges of the blades.

s is a circular concentric band placed against the rear edges of the blades about midway of the length of the latter, to which band the rear ends of the ties r are secured, preferably by being passed through said band with nuts ou the back side thereof. 'The shaft a is made to extend some distance in front of the wheel and provided at its end with a rigid flange, t, from which braces a extend obliquely back to the respective arms @,to which they are joined at pointsjust within the blades, which braces I prefer to join to said arms and iiange by screw-nuts ct, as shown. The peripheral ring k, band s, and the ties and braces l, a, 7", and u render the wheel stiff and strong for the purpose of withstanding the pressure of the wind, while all parts of the wheel are made very light, so as to have little inertia, for the purpose of making the wheel sensitive to currents of air, this being mainly the object, aimed at in my invention. The hub of the wheel is formed with a cylindrical part, b', to which a brake of simple form is to be applied to control in part the movements of the wheel.

Vhat I claim as my invention is- In combination with the crank-shaft of a windmill,` a wheel having a hub secured to said shaft, with radial arms extending from said hub, inclined blades to be acted upon by spectively, *and a band at inl-1e rear of said the wind, secured rigidly to said arms, a peblades held by said secondary ties r, substanriplieral ring secured bo the ends of said blades, tially as shown and described.

a main tie-rod joining the forward edge of DUDLEY D. WALKER. 5 each of said .blades with said arm following Witnesses: ib, secondary ties n and r, connect-ing said E. B. WHITMORE,

main tie-rod with the two adjacent blades, re- M. L. MODERMOTT. 

